spark-streaming-kafka with broadcast variable

I need to use a broadcast variable inside the Decoder I use for class parameter T in org.apache.spark.streaming.kafka.KafkaUtils.createStream. I am using the override with this signature:

Re: spark-streaming-kafka with broadcast variable

I am not sure if there is a good, clean way to do that - broadcasts variables are not designed to be used out side spark job closures. You could try a bit of a hacky stuff where you write the serialized variable to file in HDFS / NFS / distributed files sytem, and then use a custom decoder class